CN115036670A - Dual-frenquency wiFi antenna - Google Patents

Abstract

The invention provides a dual-frequency WiFi antenna which is characterized by comprising a radiation unit, a feed unit and a grounding unit, wherein the radiation unit is connected with the feed unit; the radiation unit comprises a first radiation body and a second radiation body; the feeding unit comprises a first feeding point and a second feeding point; the grounding unit comprises a first grounding point, a second grounding point and a grounding strip; the first radiator comprises a first antenna branch, a first antenna branch and a second antenna branch; the second radiator comprises a third antenna branch, a second antenna branch and a fourth antenna branch; the single radiator is provided with a radiation branch extending in the opposite direction, so that the radiation range of the antenna can be enlarged; a cable line is used as a part of an antenna radiator to realize a dual-frequency WiFi antenna; the mirror image sets up two dual-frenquency wiFi single antenna to realize the effect of common ground through the ground strip, realize the reduction of whole size, and because the structure and the size of single wiFi antenna are identical, consequently can save design cost and manufacturing cost in the production manufacturing process.

Description

Dual-frenquency wiFi antenna

Technical Field

The invention relates to the field of wireless communication, in particular to a design of a terminal double-WiFi antenna.

Background

WiFi wireless network surfing can be simply understood as wireless surfing, and almost all smart phones, tablet computers and notebook computers support WiFi surfing, which is the most widely used wireless network transmission technology at present. But the transmission speed is very fast, can reach 54Mbps, and meets the requirements of personal and social informatization.

An antenna pair: in the design of a terminal antenna, a condition that two or more antennas share a radiator or a branch is communicated may be referred to as an antenna pair, and generally, it is common that an antenna pair formed by two antennas is designed to provide a core idea of the antenna pair that antennas are arranged in a short distance or through a shared radiator, thereby reducing the overall volume of the whole antenna system. The more antennas are contained in the antenna pair, the more the volume can be reduced, but the corresponding problem that S parameters are deteriorated and difficult to adjust due to mutual influence of multiple antennas also exists.

At present, more and more terminals supporting WiFi wireless internet access are available in the market, and various terminal manufacturers provide full-scene terminal wireless equipment and terminal scenes at a glance, intelligent interconnection from a mobile phone to an automobile, intelligent home covered by full-scene WiFi to workplaces and markets covered by full-scene WiFi and the like, and all aspects of people's life are increasingly kept away from WiFi wireless internet access, so that higher requirements on the quality, transmission rate and connection efficiency of WiFi internet access are provided, and therefore, the situation that a single WiFi antenna cannot meet the requirements possibly exists in some equipment, and the requirements are further met by designing double WiFi antennas.

Disclosure of Invention

The invention aims to provide a dual-frequency WiFi antenna, and solves the problems that the existing single WiFi antenna is low in efficiency, poor in antenna radiation directivity and incapable of meeting requirements.

In order to solve the above problems, the present invention provides a dual-band WiFi antenna, which is characterized by comprising a radiation unit, a feed unit and a ground unit; the radiation unit comprises a first radiation body and a second radiation body; the feeding unit comprises a first feeding point and a second feeding point; the grounding unit comprises a first grounding point, a second grounding point and a grounding strip; the first radiator comprises a first antenna branch, a first antenna branch and a second antenna branch; the second radiator comprises a third antenna branch, a second antenna branch and a fourth antenna branch; the first antenna branch is vertically connected with the first antenna branch section; the first antenna branch is electrically connected with the first feed point; the second antenna branch is electrically connected with the first feed point; the second antenna stub is electrically connected with the grounding strip through the first grounding point; the second antenna branch is vertically connected with the third antenna branch section; the third antenna branch is electrically connected with the second feed point; the fourth antenna branch is electrically connected with the second feed point; the fourth antenna stub is electrically connected to the ground strip through the second ground point.

Optionally, in the dual-band WiFi antenna, the first radiator and the second radiator are arranged in mirror symmetry.

Optionally, in the dual-band WiFi antenna, a distance between the first radiator and the second radiator is 45 ± 0.5 mm.

Optionally, in the dual-band WiFi antenna, the total length of the ground strip is 125 ± 0.1mm, and the width of the ground strip is 10 ± 1 mm.

Optionally, in the dual-band WiFi antenna, the first antenna branch and the third antenna branch are of a spiral spring structure, a sawtooth structure, or a straight line structure.

Optionally, in the dual-band WiFi antenna, the lengths of the first antenna stub and the third antenna stub are equal and are 85 ± 0.1 mm.

Optionally, in the dual-band WiFi antenna, the first antenna branch and the second antenna branch are linear structures and extend in opposite directions.

Optionally, in the dual-band WiFi antenna, the first antenna branch and the second antenna branch have the same length, which is 5 ± 0.1 mm.

Optionally, in the dual-band WiFi antenna, the second antenna branch and the fourth antenna branch are cable lines with equal lengths.

Optionally, in the dual-band WiFi antenna, a total length of the first antenna branch and the first antenna stub is equal to a length of the second antenna stub; the total length of the second antenna branch and the third antenna stub is equal to the length of the fourth antenna stub.

The invention has the beneficial effects that:

the scheme of sharing the grounding strip is adopted, so that the size miniaturization design of the double antennas is realized, the two WiFi single antennas are arranged in a mirror image mode, the effect of sharing the ground is realized through the grounding strip, and no extra space is occupied; the single WiFi antenna is provided with the radiation branches extending in the opposite direction, so that different radiation directions of each WiFi antenna can be realized, complementation is formed, and the radiation range of the antenna is enlarged; the cable wire is used as a part of the antenna radiator and works with the antenna radiation branch knot in a coordinated mode, so that the double-frequency WiFi antenna can be achieved, a good radiation effect is achieved on the premise that a small space is occupied, and due to the fact that the structure and the size of a single WiFi antenna are completely the same, design cost and manufacturing cost can be saved in the production and manufacturing process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a structural diagram of a dual-band WiFi antenna provided in this embodiment;

fig. 2 is a simulation diagram of the efficiency of the first radiator of the dual-band WiFi antenna provided in this embodiment;

fig. 3 is a simulation diagram of the efficiency of the second radiator of the dual-band WiFi antenna provided in this embodiment;

fig. 4 is an S parameter adjustment diagram of a first radiator of a dual-band WiFi antenna according to this embodiment;

fig. 5 is an S parameter adjustment diagram of a second radiator of a dual-band WiFi antenna provided in this embodiment;

fig. 6 is an S parameter simulation diagram of a first radiator of a dual-band WiFi antenna according to this embodiment;

fig. 7 is an S parameter simulation diagram of a second radiator of a dual-band WiFi antenna according to this embodiment;

fig. 8 is a simulation diagram of a radiation direction of the dual-band WiFi antenna provided in this embodiment at a 2.4GHz frequency band;

fig. 9 is a simulation diagram of a radiation direction of the dual-band WiFi antenna provided in this embodiment at a 5.8GHz frequency band;

fig. 10 is a simulation diagram of isolation of a dual-band WiFi antenna provided in this embodiment;

wherein the reference numerals are as follows:

1-a first radiator; 2-a second radiator; 3-a ground strap; 11-a first antenna branch; 12-a first antenna stub; 13-a first feeding point; 14-a first ground point; 15-a second antenna stub; 21-a second antenna branch; 22-a third antenna stub; 23-a second feeding point; 24-a second ground point; 25-fourth antenna branch.

Detailed Description

The dual-band WiFi antenna and the terminal according to the present invention are further described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that "first", "second", etc. in the description and claims of the present invention and the accompanying drawings are used for distinguishing similar objects so as to describe the embodiments of the present invention and are not used for describing a particular order or sequence, and it should be understood that structures used in this way may be interchanged where appropriate. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention provides a double-WiFi antenna adopting a common grounding strip, two WiFi single antennas are arranged in a mirror image mode, the common grounding effect is realized through the grounding strip, and no extra space is occupied; the single WiFi antenna is provided with the radiation branches extending in the opposite direction, so that different radiation directions of each WiFi antenna can be realized, complementation is formed, and the radiation range of the antenna is enlarged; therefore, the double WiFi antennas can be realized, and a better radiation effect is realized on the premise of occupying a smaller space.

Fig. 1 is a structural diagram of a dual-band WiFi antenna provided in this embodiment, and the dual-band WiFi antenna provided in the present invention includes a first radiator 1, a second radiator 2, and a ground strip 3;

the first radiator comprises a first antenna branch 11, a first antenna branch 12, a first feed point 13, a first grounding point 14 and a second antenna branch 15; the first antenna branch 11 is vertically connected with the first antenna stub 12; the first antenna branch 12 is electrically connected with the first feeding point 13; the second antenna branch 15 is electrically connected with the first feeding point 13; the second antenna stub 15 is electrically connected to the ground strip 3 via the first ground point 14;

the second radiator comprises a second antenna branch 21, a third antenna branch 22, a second feed point 23, a second ground point 24 and a fourth antenna branch 25; the second antenna branch 21 is vertically connected to the third antenna stub 22; the third antenna branch 22 is electrically connected to the second feeding point 23; the fourth antenna branch 25 is electrically connected to the second feeding point 23; the fourth antenna stub 25 is electrically connected to the grounding strap 3 via the second grounding point 24.

Importantly, the first radiator 1 is fed through the first feeding point 13, the first radiator 2 is fed through the second feeding point 23, and the first radiator 1 and the first radiator 2 are fed through different feeding points, so that good isolation of the dual-WiFi antenna at the feeding end is ensured.

Further, the first radiator 1 is electrically connected to the ground strip 3 through the first ground point 14, and the second radiator 2 is electrically connected to the ground strip 3 through the second ground point 24, so that the first radiator 1 and the second radiator 2 share a common ground, and both the first radiator 1 and the second radiator 2 can have a larger ground area, thereby achieving better radiation characteristics.

Preferably, the distance between the first radiator 1 and the second radiator 2 is 45 ± 0.5mm, and the distance between the first radiator 1 and the second radiator 2 is between a quarter wavelength and a half wave of a 2.4G frequency, so that the isolation problem can be effectively reduced.

More preferably, the total length of the grounding strap 3 is 125 ± 0.1mm, and the width is 10 ± 1mm, wherein the length is calculated to be a wavelength designed to be 2.4G frequency, so that better grounding of the WiFi antenna can be realized.

Preferably, the lengths of the first antenna branch and the third antenna branch are equal, and the lengths of the first antenna branch and the third antenna branch are 85 ± 0.1 mm.

Preferably, the total length of the first antenna branch 11 and the first antenna stub 12 is equal to the length of the second antenna stub 15; the total length of the second antenna branch 21 and the third antenna branch 22 is equal to the length of the fourth antenna branch 25, and is about three-quarters of the wavelength of the 2.4G frequency, so as to form a dipole, which can effectively increase the radiation efficiency.

It should be noted that, in this embodiment, the first antenna branch 12 and the third antenna branch 22 are in a spiral spring structure, and the number of spiral turns of the first antenna branch 12 and the third antenna branch 22 is 4.

In fact, when the first antenna branch 12 and the third antenna branch 22 are in other shapes, such as zigzag or straight, better radiation characteristics can be achieved as long as it is ensured that the total length of the first antenna branch 11 and the first antenna branch 12 is equal to the length of the second antenna branch 15; the total length of the second antenna branch 21 and the third antenna branch 22 is equal to the length of the fourth antenna branch 25, and is about three-quarters of the wavelength of the 2.4G frequency, so as to form a dipole, which can effectively increase the radiation efficiency. Specifically, the available space of the antenna and the frequency requirement of the antenna may be further adjusted, and the specific adjustment manner is well known to those skilled in the art and will not be described herein again.

Further, when the first antenna branch 12 and the third antenna branch 22 are zigzag, the number of the zigzag teeth of the zigzag antenna may be obtained by debugging, and specifically, the number may be adjusted according to the space available for the antenna and the frequency requirement of the antenna, and the specific adjustment method is well known to those skilled in the art and will not be described herein again.

Fig. 2 is a simulation diagram of efficiency of a first radiator of a dual-band WiFi antenna provided in this embodiment, and fig. 3 is a simulation diagram of efficiency of a second radiator of a dual-band WiFi antenna provided in this embodiment, and it can be seen from fig. 2 and fig. 3 that the first radiator 1 and the second radiator 2 both achieve better radiation efficiency by forming a dipole.

Fig. 4 is an S parameter tuning diagram of a first radiator of a dual-frequency WiFi antenna provided in this embodiment, fig. 5 is an S parameter tuning diagram of a second radiator of the dual-frequency WiFi antenna provided in this embodiment, fig. 6 is an S parameter simulation diagram of the first radiator of the dual-frequency WiFi antenna provided in this embodiment, fig. 7 is an S parameter simulation diagram of the second radiator of the dual-frequency WiFi antenna provided in this embodiment, and it can be seen from fig. 4 to fig. 7 that the first radiator 1 and the second radiator 2 both achieve good radiation characteristics and radiation efficiency at a 2.4GHz frequency point and a 5.8GHz frequency point, and have less mutual interference, and do not affect the radiation efficiency of a specific WiFi frequency point.

More preferably, the first antenna branch 11 and the second antenna branch 21 are equal in length, and the lengths of the first antenna branch 11 and the second antenna branch 21 are designed to be 5 ± 0.1mm by using the principle of 5.8G wavelength, so that the whole antenna has dual frequencies of 2.4GWIFI and 5.8GWIFI at the same time; furthermore, because the first radiator 1 and the second radiator 2 are arranged in a mirror image manner, and the first antenna branch 11 and the second antenna branch 21 are both arranged perpendicular to the main radiator, different directional characteristics of the first radiator 1 and the second radiator 2 can be realized, and complementation is formed.

Fig. 8 is a simulation diagram of the radiation direction of the dual-frequency WiFi antenna at the 2.4GHz band provided by this embodiment, and it can be seen from the diagram that the main radiation directions of the first radiator 1 and the second radiator 2 at the 2.4GHz band are opposite, which can achieve a good complementary effect, and implement the omnidirectional characteristic of the dual-frequency WiFi antenna, and better fit with actual requirements.

Fig. 9 is a simulation diagram of a radiation direction of the dual-band WiFi antenna at a 5.8GHz band provided by this embodiment, and it can be seen from the diagram that the main radiation directions of the first radiator 1 and the second radiator 2 at the 5.8GHz band are opposite, so that a good complementary effect can be achieved, an omnidirectional characteristic of the dual-band WiFi antenna is achieved, and a practical requirement is better met.

More importantly, since the layout distance left between the first radiator 1 and the second radiator 2 is between the quarter wavelength and the half wave of the 2.4G frequency, the isolation problem can be effectively reduced, and the feeding points of the first radiator 1 and the second radiator 2 which are grounded are different and respectively feed, and the distance between the first feeding point 13 and the second feeding point 23 is also between the quarter wavelength and the half wave of the 2.4G frequency, so that better isolation can be realized at the feeding end.

Fig. 10 is a simulation diagram of isolation of the dual-band WiFi antenna provided in this embodiment, and it can be seen from the diagram that isolation of-20 dB or more can be achieved in a frequency band of about 2.4GHz for the first radiator 1 and the second radiator 2, and isolation of-19 dB or more can be achieved in a frequency band of about 5.8GHz for the first radiator 1 and the second radiator 2, so that the entire dual-band WiFi antenna achieves very good isolation, and meets the requirements.

In summary, the present embodiment provides a dual-band WiFi antenna, which includes a first radiator, a second radiator, and a ground strip; the first radiator comprises a first antenna branch, a first feed point, a first grounding point and a second antenna branch; the first antenna branch is vertically connected with the first antenna branch section; the first antenna branch is electrically connected with the first feed point; the second antenna branch is electrically connected with the first feed point; the second antenna branch node is electrically connected with the grounding strip through the first grounding point; the second radiator comprises a second antenna branch, a third antenna branch, a second feed point, a second grounding point and a fourth antenna branch; the second antenna branch is vertically connected with the third antenna branch section; the third antenna branch is electrically connected with the second feed point; the fourth antenna branch is electrically connected with the second feed point; the fourth antenna branch is electrically connected with the grounding strip through the second grounding point; the scheme of sharing the grounding strip is adopted to realize the size miniaturization design of the double antennas, the two WiFi single antennas are arranged in a mirror image mode, the effect of sharing the ground is realized through the grounding strip, and no extra space is occupied; the single WiFi antenna is provided with the radiation branches extending in the opposite direction, so that different radiation directions of each WiFi antenna can be realized, complementation is formed, and the radiation range of the antenna is enlarged; a cable wire is used as a part of an antenna radiator and cooperates with an antenna radiation branch, so that a dual-frequency WiFi antenna can be realized; the antenna has the advantages that the antenna can achieve a good radiation effect on the premise of occupying a small space, and the design cost and the manufacturing cost can be saved in the production and manufacturing process because the structure and the size of the single WiFi antenna are completely the same.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims (10)

1. A dual-frequency WiFi antenna comprises a radiation unit, a feed unit and a grounding unit; the radiation unit comprises a first radiation body and a second radiation body; the feeding unit comprises a first feeding point and a second feeding point; the grounding unit comprises a first grounding point, a second grounding point and a grounding strip;

the method is characterized in that: the first radiator comprises a first antenna branch, a first antenna branch and a second antenna branch; the second radiator comprises a third antenna branch, a second antenna branch and a fourth antenna branch; the first antenna branch is vertically connected with the first antenna branch section; the first antenna branch is electrically connected with the first feed point; the second antenna branch is electrically connected with the first feed point; the second antenna stub is electrically connected with the grounding strip through the first grounding point; the second antenna branch is vertically connected with the third antenna branch section; the third antenna branch is electrically connected with the second feed point; the fourth antenna branch is electrically connected with the second feed point; the fourth antenna stub is electrically connected to the ground strip through the second ground point.

2. The dual-band WiFi antenna of claim 1 wherein the first radiator and the second radiator are mirror symmetric.

3. The dual-band WiFi antenna of claim 1 wherein the distance between the first radiator and the second radiator is 45 ± 0.5 mm.

4. The dual-band WiFi antenna of claim 1 wherein the ground strap has a total length of 125 ± 0.1mm and a width of 10 ± 1 mm.

5. The dual-band WiFi antenna of claim 1 wherein the first antenna stub and the third antenna stub are coil spring structures or saw tooth structures or straight structures.

6. The dual-band WiFi antenna of claim 1 wherein the first antenna stub and the third antenna stub are equal in length, 85 ± 0.1 mm.

7. The dual-band WiFi antenna of claim 1 wherein said first antenna branch and said second antenna branch are straight and extend in opposite directions.

8. The dual-band WiFi antenna of claim 1 wherein said first antenna branch and said second antenna branch are equal in length and 5 ± 0.1 mm.

9. The dual-band WiFi antenna of claim 1 wherein the second antenna stub and the fourth antenna stub are cable wires of equal length.

10. The dual-band WiFi antenna of claim 1 wherein a total length of the first antenna branch and the first antenna stub is equal to a length of the second antenna stub; the total length of the second antenna branch and the third antenna stub is equal to the length of the fourth antenna stub.

Images